I think you should start a weekly series about what you would do with your camper... get people pumped up about it and let people know that this series is going to fund your camper. Then... when you get it, you can continue your series WITH your POB bought camper. Just a thought.
Good should @allcapsonezero - That would probably be the best way to go about it!
build up a following for the weekly, and then you know that when you buy the van, everything is on the up and up.